I've got a small tub of the Cycle Design silver brazing flux. Since the spring, it's developed a granular (okay, more like tapioca-like) consistency. The main carrier is still very wet, it's just got a bunch of very hard little balls of... I don't know what it is -- in it.

Background -- my "shop" is about 1/3 of a tar-roofed double car garage, and in the summer afternoons with the sun beating down on that tar, it gets well over 100 degrees in there. I can't even think of working out there in the afternoons. Could this be causing whatever it is to precipitate out?

Is this stuff now useless? Can it be saved somehow?